Image analysis – Color image processing – Color correction
Patent
1997-02-03
1998-05-05
Couso, Yon
Image analysis
Color image processing
Color correction
358456, 382252, G06K 900
Patent
active
057487723
ABSTRACT:
An image processing apparatus of a digital copying machine, a digital facsimile, or a printer comprises an input unit to input multi-level data; an arithmetic operating circuit for adding error data to the input multi-level data and for calculating error correction data; a selector to select a predetermined dot pattern on the basis of the error correction data; an error calculation circuit to calculate a difference between the representative value for each dot pattern and the error correction data; a storage memory for storing the difference as error data into a memory; and a dot pattern memory in which dot patterns corresponding to a plurality of colors have been stored. The input unit inputs multi-level image data of a plurality of colors and the selector selects the dot pattern whose dot arrangement differs in accordance with the color of the multi-level image data.
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Masaki Katsumi
Moro Takahiro
Onodera Ken
Sawaki Takafumi
Ushiroda Atsushi
Canon Kabushiki Kaisha
Couso Yon
Patel Jayanif K.
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